Pump for spraying devices.



L. M. GAMPAU.

PUMP FOR SPRAYING DEVICES. APPLICATION FILED APR. 8. 1911.

1,071,876, Paten ted Sept. 2, 1913.

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Y 1mm; cemccm oowu that l, Liva'lnncos ht. time ol the United St is, iding ouoty oi. Custer, tltate otb-avc invented certain new aiuil. .1 movements in lumps tor ttlprayii: vices; and I do declare the :toltowll to be a toll, clear, and description oi the invention, Slittlll -nll errahl others in th idir to characters oi reference marked thereon, which form a part of this specification.

This invention relates to a device for supplying air pro ro to portable spraying 1 the construction and he some, relerenc lacing had arrar n. set forth and pointed out the claim.

The ol rject qt the invention is to provide simple and stilt-bent means actuatablc by the operator in walking, oradaptccbto be actuated by a movement oi the feet of the operator, wl'lcreby a constant supply of air under p are may be furnished to a spray a used in the spraying'ot trees and ".l hc alcove object is attained by aratus illustrated in the accompany r vftnu's, in which L ure l is a perspective View illustrating the application of myinvention. Fig.2 1s a perspective View of one of the foot. pieces to which is attached an air compressor. 3 is an enlarged perspective. view o't one term at an air compressor adapted for tmrpose, dct-acherjl from the toot piece. 1 1g. 4; isa longitudinal section through the foot piece and air compressor, the air pipes and attaching straps being broken away, the section through the bellows or air compressor being; taken as on line -l-st of Fig. Fig. his a horizontal. section through the bellows or air compressor, as on line of Fig". t.

Referring to the characters of reference, Il designatcs a spraying tank. adapted to contain the fluid to be sprayed, and into which air is forced to create the necessary pressure, through the intake pipe 2. Communicating with the air intake pipe 9 are the air supply pipes At the juncture of said pipes is placed a suitable relief valve 4. Leading from the underside ot the tank is a spray pipe 5 having the usual nozzle 6. All

art to which it appertains to the accomy. rnyino drawings, and to the of this apparatus is carried on the operator, asphown in llig. l.

.to provide :tor compressing the necessary minority of air and forcing it into the tank 1. toot pieces 7 are tunployed adapted to be fastened to the feet or the operator by the attaching straps S and t). The foot piece is provided with a suitable heel l0 ahd on the under side of the sole thereof is secured an air compressor which I have herein illustratcd in, the form (lit a hollows, consisting of a top plate 11 though the medium of i which it is secured to the foot piece,and a bottom plate 12 which is hinged to the top plate at its front end. Connecting the two plates 11 and 12 is the usual flexible material l3 rendered impermeable to air.

interposed between the two plates of the bellows is a compressible spring 14 which serves to hold the bottom plate distended. Communicating with each bellows or air compressing device is an intake pipe 1st having a suitable check valve 15 therein through which a volume of air may be drawn as the bellows expands. The air supply pipes 3 conununicate with the air compressors, respectively, and are provided with suitable check valves 16, as shown in Fig. 3. lhe tern'nuuls ot the intake pipes l t" are so pport ed as to prevent the entrance of dust and dirt tlmreinto. With the air compressors secured to the feet of the operator, the operation of walking will successively actuate said compressors to force a quantity of air from each under pressure into the tank i, as the weight of the operator is borne first upon one toot and then upon the other. In each instance as the weight ol the operator is lifted from the compressor, the spring 141 will operate to expand the bellows to draw tberointo a quantity of air for a succeeding operation. In like manner the air may be compressed when the operator standing by alternately shifting his weight from one foot to the other.

It will now be apparcnt'that by the use of this device, an unlimited. quantity of air may be supplied. to the pressure tank in a simple and ellicicnt manner, obviating the necessity of pumping the air into the tank by hand to create the necessary pressure. It will further be observed that with this device, the supply of air is practically oontinuous, thereby enabling a uniform pressure in the tank to be maintained.

Having thus fully set forth-my invention, what I claim as new and desire to secure by Letters Patent, is

1. A pump for spraying devices comprising foot pieces adapted to be secured to the respective feet of the operator, air compressors in the form of bellows attached to the espective soles of said foot pieces, valve controlled air intake pipes communicating respectively with said compressors and having their free ends supported above said foot pieces, and an air educt' pipe adapted to be connected to a pressure tank and having a valve controlled branch leading from each of said air compressors whereby a constant pressure is created in the pressuretank.

2. A pump for spraying devices comprising foot pieces adapted to be secured to the respective feet of the operator, bellows atowers tached to the respective soles of said foot pieces, the movable side of the said bellows hinged to the toe of the's'aid foot pieces, heels extending substantially to the lower edge of the movable side of the said bellows, valve controlled air intake pipes communieating respectively with said bellows and having their free ends supported above said foot pieces, and an air educt pipe adapted to vbe connected to a pressure tank and having a valve controlled branch leading from each of said air bellows.

In testimony whereof, I sign this specification in the presence of two witnesses.

LAWRENCE M. CAMPAU.

Witnesses:

J. S. SMITH,

JOHN MCNAMARA. 

